Note that the four pin header really is only two connections, a pair of pins for each end of the resistors. So if you select the left two they are connected to the same thing and same for the right two. They are ganged up together to provide higher current output.

You just need to run a two conductor wire from the resistors.For example I have my resistors running in parallel, hooked up with 18 gauge two conductor wire. Each wire connects to TWO of the four pins. if If you are looking at the board from the side - left two pins ground/V- and the right two are 12v/V+.The bottom of the board is silk screened with what the pins are.